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CDMA系统由于其用户容量大 ,频谱利用率高、支持多速率通信等特点而优于其它多址方式 ,近年来在移动通信系统中得到越来越多的重视。但是CDMA通信系统本身所固有的“远近效应”问题严重限制了系统容量的进一步提高。本文重点论述国内外关于多用户检测技术的研究动态 ,并对几种典型的多用户检测技术进行性能评价。
CDMA systems are superior to other multiple access methods due to their large subscriber capacity, high spectrum utilization, and support for multi-rate communications. In recent years, CDMA systems have drawn more and more attention in mobile communication systems. However, the “near-far effect” inherent in the CDMA communication system severely limits the further improvement of the system capacity. This article focuses on the domestic and international multi-user detection technology research trends, and several typical multi-user detection technology for performance evaluation.